Good points TB. How in the world would he expect the five families dons to show up at any meeting if he commissioned any inquiry let alone all inquiries. "Hey Barzini, this is Phillip. You know Vito's trying to find out who killed his kid. You still gonna go to that meeting? I think it's a set-up. Oh, he's arranging hostages? I'm still not sure. It could turn out to be a really good set-up."

Besides, even if he sought inquiries, that's quite an awkward way to express it - all inquiries.

What ya'll are hearing is a short o vowel sound as opposed to the usual long o vowel sound on the end of No.